[Traveling through parallel worlds/siblings AU] After the Goblet of Fire ended, the two Fuha fell into a similar magical world at the same time during the battle. In this world, Tom Riddle and Harry Potter were a couple, and if they want to find a way to go back, they need the "sincere" cooperation between these old enemies... (There are some private settings that are different from the original plot development)
Purpose: To explore the possibility of a pair of old enemies changing their views on each other and their future decisions in a harmonious and beautiful new world.